Who else has 1 ms feedhold ?
4 Mhz threading ?
Glass scale feedback at 4 Mhz ?
4 Mhz homing ?
Hw MPGs with instant feedback, due to 1 ms update loop ?
High-speed servo spindles, with differential signalling, for rigid tapping on mill and lathe ?
24V industrial IO ?

Please, let me know ...
I am not getting into this debate but I believe Linuxcnc Master Branch can now do homing with slaved axis and the standard install can do all of the above with Mesa cards